Define Widget Navigator Scroll Position

intapiuser - The above is really useful, I don't suppose you or someone else may know how to adapt this to also include forecasts?  The script also seems to work for a line chart with dates across the x-axis, in that this will show me the last 14 days:

//======================= Configuration =======================
//Number of bars you would like to display, starting from the last bar
var displayBars = 14;
//================================================================

widget.on('processresult',function(widget,args){

     //define the maximum bar count to be the series length, minus 1 because the below is zero indexed. 
     var maxBarCount = (args.result.series[0].data.length - 1);

     args.widget.options.previousScrollerLocation.min = maxBarCount - displayBars + 1;
     args.widget.options.previousScrollerLocation.max = maxBarCount;
});

However, it doesn't show me the forecast period, just the actual data points:

Ideally, I am looking for something that shows the last 14 days, and also the forecast period, like this:

Thanks,
James